docs: reports contract names only the collector's two counting calls under its session id; INSTALL.md qualifies the title claim (#157)

Files changed:
- CHANGES.md
- INSTALL.md
- VERSION
- reports/CONTRACT.md

CHANGES.md

@@ -59,7 +59,7 @@ concern - readable here, never shipped as something to parse.
 
 ---
 
-## 8.0.0-beta.6 - 2026-09-30 - bug-report instruction: offer WIKI_TRACE=1 for a reproduction
+## 8.0.0-beta.7 - 2026-09-30 - reports/CONTRACT.md: only the collector's two counting calls take the bugreport session id
 
 **Author:** Torben Nehmer
 
@@ -111,8 +111,24 @@ concern - readable here, never shipped as something to parse.
 - new_page/type_resolver comments no longer claim only entities declare a layout:
 - Demo corpus follows the decided project pages: three states, seed with their items (#156)
 - bug-report instruction: offer WIKI_TRACE=1 for a reproduction
+- reports/CONTRACT.md: only the collector's two counting calls take the bugreport session id
 <!-- /wikitool:bumps -->
 
+### reports/CONTRACT.md: only the collector's two counting calls take the bugreport session id
+
+The contract said all of the collector's `wikitool` calls run under `bugreport-<stamp>`. Only
+`instructions verify` and `docs verify` do; `version show`, `doctor` and `budget status` inherit
+the caller's id, as `gates.md` and the script already said. `INSTALL.md`'s troubleshooting entry
+also no longer claims page titles stay out of the whole bundle: they stay out of what the script
+generates, while the trace - included by default - may carry them.
+
+### bug-report instruction: offer WIKI_TRACE=1 for a reproduction
+
+A distributed instance records no trace by default, so the default "trace in" often had nothing to
+include. `instructions/bug-report.md` now offers, when the failure can be reproduced, to repeat the
+failing step in one new shell with `WIKI_TRACE=1` set for that session only - never by changing
+the checkout's telemetry configuration.
+
 ### Bug-report collector: tools/bugreport.py and instructions/bug-report.md (Gitea #157)
 
 A failure on one machine used to reach the maintainer as a description. `tools/bugreport.py` now